first tournament for a wrestler; debut on the dohyō
Sumo term referring to a wrestler's first appearance in an official tournament or on the raised ring.
He is a new apprentice who has just made his debut on the dohyō.
He won his first bout in his debut tournament.
Compound of 初 (hatsu, 'first') and 土俵 (dohyō, 'sumo ring').